557. Reverse Words in a String III

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Problem

Given a string s, reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.

Example 1:

Input: s = "Let's take LeetCode contest"
Output: "s'teL ekat edoCteeL tsetnoc"

Example 2:

Input: s = "God Ding"
Output: "doG gniD"

Constraints:

• $1 <= s.length <= 5 * 10^4$
• s contains printable ASCII characters.
• s does not contain any leading or trailing spaces.
• There is at least one word in s.
• All the words in s are separated by a single space.

Code

class Solution {
    public String reverseWords(String s) {
        String words[] = s.split(" ");
        StringBuilder res = new StringBuilder();

        for (String word : words) {
            res.append(new StringBuilder(word).reverse() + " ");
        }

        return res.toString().trim();
    }
}